leoliu0/texres v0.4.4

v0.4.4: native LuaTeX engine, automatic convergence, and in-tree graphics

on GitHub

Release v0.4.4

Ratex v0.4.4 delivers complete native LuaTeX engine execution, fully automatic multi-pass convergence, in-tree pure-Rust PostScript/EPS and MetaPost engines, and extensive font embedding and visual parity fixes across Latin Modern, CJK, and mathematical symbol fonts.

Highlights & New Features

• Native LuaTeX Engine Profile (EngineKind::LuaTeX, lualatex, -lualatex):

  • Integrated in-tree pure-Rust Lua 5.3 runtime (tex-lua and tex-lua-derive) and precompiled LuaLaTeX format (lualatex.fmt.zst).
  • Dynamic primitive aliasing via tex.enableprimitives allows packages like iftex.sty to bind \IFTEX@detokenize and \IFTEX@protected.
  • Full LuaTeX math primitives (\Ustack, \Ustartmath, \Ustopmath) and style dimension parameters (\Umathfractiondelsize, \Umathstacknumup, \Umathstackdenomdown, \Umathstackvgap) resolve amsmath's \binom and generalized fractions under LuaTeX.
  • Preloaded standard modules: luatexbase, ltluatex, luaharfbuzz, fontloader, l3backend-luatex, and lualatexquotejobname.
  • 100% embedded font subsets for Latin Modern Roman, Sans, and Math OpenType fonts under lualatex.

• Fully Automatic Pass Convergence:

  • Removed manual single-pass CLI flags (-1, --single-pass) and PassPolicy::Single.
  • Convergence is now strictly automatic: clean documents without cross-references or citations finish in 1 pass, while documents with references, citations, tables of contents, or bibliographies run the exact required passes until auxiliary state stabilizes.

• In-Tree PostScript & MetaPost:

  • Pure-Rust PostScript Level 2/3 and EPS interpreter (tex-ps) converts figures to PDF in-memory without external Ghostscript or shell dependencies.
  • Pure-Rust MetaPost 3.00 engine and mplib runtime (tex-mplib).

• Font & Rendering Fixes:

  • Eliminated zero-width Latin character leakage after CJK font embedding across all pages.
  • Fixed empty paragraph top-box artifact (\leavevmode / \noindent with empty hlist).
  • Verified embedded subsets and visual rendering for CJK (CJKutf8), stmaryrd, bbding, and Latin Modern OpenType fonts.
  • Verified Spanish Babel hyphenation and caption convergence.
  • Corrected \chardef dimension scaling in sp and preserved unexpandable active characters during \edef.

Verification

• Workspace Tests: All 1,464 tests across 52 test suites pass.
• Visual Audits: Poppler and pdf.js rendering verified on multi-script, CJK, and complex mathematical formulas with 0 glyph clipping or font substitution artifacts.

Full Changelog: v0.4.3...v0.4.4